Simulated multi-scale watershed runoff and sediment production based on GeoWEPP model

查看全文 作　　者：YU [1]Xinxiao;ZHANG [2]Xiaoming;NIU [3]Lili

机构地区：[1]Prof. Dr., Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China,;[2]Dr. China Institute of Water Resource and Hydropower Research, Beijing 100048, China;[3]Dr., Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China

出　　处：《International Journal of Sediment Research》索引2009年第24卷第4期,共14页

基　　金：supported by the National Natural Scientific Foundation of China (Grant No.40871136) 摘　　要：The runoff and sediment yield data from the Qiaozidonggou, Qiaozixigou, and Lu'ergou watersheds, in the Loess Plateau of China are used to calibrate and validate the runoff and sediment yield simulated by GeoWEPP model of the WEPP Model at watershed scale. The indices of relative error, R, correlation coefficient, R 2 , and Nash-Suttcliffe efficiency coefficient En s are used to evaluate the model fit. The eco-hydrological responses in the Luoyugou and Lu'ergou watersheds are also forecast based on the WEPP Model. Meanwhile, the relation between vegetation pattern changes and sediment yield in the watershed is discussed, and the responses of runoff and sediment yield in the watersheds concerning forest growth stages are studied. The results show that the relative errors of simulated values of runoff and sediment yield are below 30%, the correlation coefficients are above 0.90, and the Nash-Suttcliffe efficiency coefficients are above 0.80. The simulation results present satisfactory performance, thus, the model could be used to simulate the runoff and sediment yield in these small watersheds. It is also observed that soil erosion tended to become severe as precipitation increased in the watershed, while soil erosion has a decreasing trend as forest cover increases and vegetation pattern is optimized. When the watershed is fully covered by forest, erosion and sediment yield are minimized. When the forest cover is about 30% and evenly distributed in the watershed, the erosion intensity is lower than if the forest cover is collectively distributed in the watershed. Erosion varies with different forest growth stages in the watershed; it is more serious at the young and near planting stage and is the smallest at the mature forest stage. 关键词：小流域径流产沙模型模拟模型多尺度森林覆盖率 WEPP模型流域产沙量基础

相关文献

参考文献（10）
引证文献（20）
耦合文献（170）

参考文献(10)

引证文献(20)

耦合文献(170)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Simulated multi-scale watershed runoff and sediment production based on GeoWEPP model

参考文献(10)

引证文献(20)

耦合文献(170)

用户提示